# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@ens-lyon.org>
# Date 2017-03-15 06:49:25
# Node ID a53f2d4c734f403a7237867e8f8ff5cdc6c5b369
# Parent  86dfd31c03299fdfc9d2a65dd9a1ab378b94613a

httpclient: don't use mutable default argument value

Caught by pylint.

diff --git a/mercurial/httpclient/__init__.py b/mercurial/httpclient/__init__.py
--- a/mercurial/httpclient/__init__.py
+++ b/mercurial/httpclient/__init__.py
@@ -631,7 +631,7 @@ class HTTPConnection(object):
         self.close()
         self._connect(pheaders)
 
-    def request(self, method, path, body=None, headers={},
+    def request(self, method, path, body=None, headers=None,
                 expect_continue=False):
         """Send a request to the server.
 
@@ -642,6 +642,8 @@ class HTTPConnection(object):
         available. Use the `getresponse()` method to retrieve the
         response.
         """
+        if headers is None:
+            headers = {}
         method = _ensurebytes(method)
         path = _ensurebytes(path)
         if self.busy():